.22 Wildcat - which moderator?

Hi gents.

Looking to pick up a bullpup here shortly and i've got a deposit on a wildcat. I need it to be as quiet as possible (lousy eurasian doves in suburbia). AoA mentioned that they have the FX mod or the Huggett. I haven't tried either. Anybody out there who has experience with these? How much length they add and which does a better job of hushing the wildcat up?

I realize the 22 is quiet as is - looking for the ultimate "nosey neighbor backyard friendly" gun.